Malicious PDF — malware analysis report

Static analysis result for SHA-256 1473ef012d3d96e8…

MALICIOUS

PDF

38.3 KB Created: 2020-04-10 04:03:20 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f864ebec314d193a30d2939a068e3a4f SHA-1: 8f25f367a12d425bca1a71ace9ddbabe1d9eae59 SHA-256: 1473ef012d3d96e8859219426664023234a16e4b81c6ed0aaad3d282d56fb153
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document exhibits characteristics of a link farm, embedding a large number of external URLs. The primary heuristic indicates a mass external PDF link farm, suggesting the document's purpose is to distribute or redirect to numerous other potentially malicious PDFs. While no scripts were directly extracted, the embedded URLs are the main indicators of malicious intent, likely serving as lures or downloaders.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://drywallnewmarket.com/uploads/1/3/0/4/130489377/130489377.html#neato+robotics+botvac+d8500
    • http://nannytherapy.net/uploads/1/3/0/7/130776126/c402269cf5.pdf
    • http://pgreenphotography.com/uploads/1/3/0/6/130639180/6389060.pdf
    • http://ff-miami.com/uploads/1/3/0/7/130740265/3f7662f17a13a1.pdf
    • http://universitycommercecenter.com/uploads/1/3/0/6/130605219/bunejodusikoku.pdf
    • http://vonwebdesign.com/uploads/1/3/0/7/130739446/cfd13c778be31b9.pdf
    • http://powerofpartial.net/uploads/1/3/0/9/130969498/babaposawesuw.pdf
    • http://hostgroningen.com/uploads/1/3/0/7/130775242/zigoragonodeso.pdf
    • http://craigalanrealtyllc.com/uploads/1/3/1/6/131637374/2989160.pdf
    • http://carolinecolombo.com/uploads/1/3/0/6/130605347/713042.pdf
    • http://iclipse.org/uploads/1/3/0/8/130874455/4339c.pdf
    • http://5dopendoor.com/uploads/1/3/0/5/130590618/golaw_fixolef.pdf
    • http://mancavemountain.com/uploads/1/3/1/4/131406930/3836515.pdf
    • http://businessfurniturecleaning.com/uploads/1/3/0/8/130874143/4984541.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b60.bin
daaeab25dbc98cd4176cc2d2f5acb022b5460bff0fa5287611125361af107ed3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B60 8656 bytes

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